0ea329fec4
Weijie Gao has submitted an updated version of the patchset adding support for MT7986 and MT7981 to U-Boot. Use that v2 patchset. Changes of v2: - Add cpu driver for print_cpuinfo() - Fix NULL pointer dereference in mtk_image (was already fixed in OpenWrt) - Fix coding style - Minor changes https://patchwork.ozlabs.org/project/uboot/list/?series=316148 Signed-off-by: Daniel Golle <daniel@makrotopia.org>
134 lines
3.1 KiB
Diff
134 lines
3.1 KiB
Diff
From e3c707d23a3a5bc1ba9b8c03731a32c3714ae56a Mon Sep 17 00:00:00 2001
|
|
From: Weijie Gao <weijie.gao@mediatek.com>
|
|
Date: Wed, 31 Aug 2022 19:05:20 +0800
|
|
Subject: [PATCH 28/32] cpu: add basic cpu driver for MediaTek ARM chips
|
|
|
|
Add basic CPU driver used to retrieve CPU model information.
|
|
|
|
Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
|
|
---
|
|
drivers/cpu/Makefile | 1 +
|
|
drivers/cpu/mtk_cpu.c | 106 ++++++++++++++++++++++++++++++++++++++++++
|
|
2 files changed, 107 insertions(+)
|
|
create mode 100644 drivers/cpu/mtk_cpu.c
|
|
|
|
--- a/drivers/cpu/Makefile
|
|
+++ b/drivers/cpu/Makefile
|
|
@@ -9,6 +9,7 @@ obj-$(CONFIG_CPU) += cpu-uclass.o
|
|
obj-$(CONFIG_ARCH_BMIPS) += bmips_cpu.o
|
|
obj-$(CONFIG_ARCH_IMX8) += imx8_cpu.o
|
|
obj-$(CONFIG_ARCH_AT91) += at91_cpu.o
|
|
+obj-$(CONFIG_ARCH_MEDIATEK) += mtk_cpu.o
|
|
obj-$(CONFIG_CPU_MPC83XX) += mpc83xx_cpu.o
|
|
obj-$(CONFIG_CPU_RISCV) += riscv_cpu.o
|
|
obj-$(CONFIG_SANDBOX) += cpu_sandbox.o
|
|
--- /dev/null
|
|
+++ b/drivers/cpu/mtk_cpu.c
|
|
@@ -0,0 +1,106 @@
|
|
+// SPDX-License-Identifier: GPL-2.0
|
|
+/*
|
|
+ * Copyright (C) 2022 MediaTek Inc. All rights reserved.
|
|
+ *
|
|
+ * Author: Weijie Gao <weijie.gao@mediatek.com>
|
|
+ */
|
|
+
|
|
+#include <linux/types.h>
|
|
+#include <cpu.h>
|
|
+#include <dm.h>
|
|
+#include <fdt_support.h>
|
|
+#include <mapmem.h>
|
|
+#include <asm/global_data.h>
|
|
+#include <linux/io.h>
|
|
+
|
|
+DECLARE_GLOBAL_DATA_PTR;
|
|
+
|
|
+struct mtk_cpu_plat {
|
|
+ void __iomem *hwver_base;
|
|
+};
|
|
+
|
|
+static int mtk_cpu_get_desc(const struct udevice *dev, char *buf, int size)
|
|
+{
|
|
+ struct mtk_cpu_plat *plat = dev_get_plat(dev);
|
|
+
|
|
+ snprintf(buf, size, "MediaTek MT%04X", readl(plat->hwver_base));
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int mtk_cpu_get_count(const struct udevice *dev)
|
|
+{
|
|
+ return 1;
|
|
+}
|
|
+
|
|
+static int mtk_cpu_get_vendor(const struct udevice *dev, char *buf, int size)
|
|
+{
|
|
+ snprintf(buf, size, "MediaTek");
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int mtk_cpu_probe(struct udevice *dev)
|
|
+{
|
|
+ struct mtk_cpu_plat *plat = dev_get_plat(dev);
|
|
+ const void *fdt = gd->fdt_blob, *reg;
|
|
+ int offset, parent, len, na, ns;
|
|
+ u64 addr;
|
|
+
|
|
+ if (!fdt)
|
|
+ return -ENODEV;
|
|
+
|
|
+ offset = fdt_path_offset(fdt, "/hwver");
|
|
+ if (offset < 0)
|
|
+ return -ENODEV;
|
|
+
|
|
+ parent = fdt_parent_offset(fdt, offset);
|
|
+ if (parent < 0)
|
|
+ return -ENODEV;
|
|
+
|
|
+ na = fdt_address_cells(fdt, parent);
|
|
+ if (na < 1)
|
|
+ return -ENODEV;
|
|
+
|
|
+ ns = fdt_size_cells(gd->fdt_blob, parent);
|
|
+ if (ns < 0)
|
|
+ return -ENODEV;
|
|
+
|
|
+ reg = fdt_getprop(gd->fdt_blob, offset, "reg", &len);
|
|
+ if (!reg)
|
|
+ return -ENODEV;
|
|
+
|
|
+ if (ns)
|
|
+ addr = fdt_translate_address(fdt, offset, reg);
|
|
+ else
|
|
+ addr = fdt_read_number(reg, na);
|
|
+
|
|
+ plat->hwver_base = map_sysmem(addr, 0);
|
|
+ if (!plat->hwver_base)
|
|
+ return -EINVAL;
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static const struct cpu_ops mtk_cpu_ops = {
|
|
+ .get_desc = mtk_cpu_get_desc,
|
|
+ .get_count = mtk_cpu_get_count,
|
|
+ .get_vendor = mtk_cpu_get_vendor,
|
|
+};
|
|
+
|
|
+static const struct udevice_id mtk_cpu_ids[] = {
|
|
+ { .compatible = "arm,cortex-a7" },
|
|
+ { .compatible = "arm,cortex-a53" },
|
|
+ { .compatible = "arm,cortex-a73" },
|
|
+ { /* sentinel */ }
|
|
+};
|
|
+
|
|
+U_BOOT_DRIVER(cpu_mtk) = {
|
|
+ .name = "mtk-cpu",
|
|
+ .id = UCLASS_CPU,
|
|
+ .of_match = mtk_cpu_ids,
|
|
+ .ops = &mtk_cpu_ops,
|
|
+ .probe = mtk_cpu_probe,
|
|
+ .plat_auto = sizeof(struct mtk_cpu_plat),
|
|
+ .flags = DM_FLAG_PRE_RELOC,
|
|
+};
|